If everything works, it is a good way to use flash, without automation, away from the camera.
I've been doing it for decades.
The problem is the "if everything works" element.
1/ Your flash needs to have a socket into which you can plug one end of the cord.
Many modern flash units do not have this kind of socket. Of the flash guns that do, there's a variety of socket configurations, so make sure the plug on the cord matches the hole on the flash.
2/ You camera needs to have a socket into which the other end of the cord is plugged.
Most modern D-SLR cameras do not have this socket; the more money you spend on a camera, the morelikely it is there will be a socket.
You can buy adapters that fit into the hotshoe, and into which you plug the cord. Nikon AS-15 works on Nikons and works fine on my Canons, and probably works fine on lots of other cameras, too. Also look for the Wein brand.
3/ No automation using most flash guns.
There is, basically, two kinds of automation.
Through the Lens automation is out. (camera measures light coming into the camera, andsets flash for proper amount) This is i-TTL on Nikon, e-TTL on Canon, etc. Doesn't work.
"Regular" automation usually invoplves a sensor on the flash itself. Light goes from flash to subject, bounces back to flash, flash turns itself off at the appropriate time.
This works fine with this kind of cord.
But most modern flash guns do not have this feature. So, check carefully. You may be in luck.
4/ Don't trip over the cord and pull over the flash on a stand, or the camera on a tripod, or yourself.
All inall, if compatibility is solved, it's a good methid, usign guide numbers to calculate camera settings.
